JPH0565559B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a liquid cleaning composition, and more particularly, a liquid cleaning composition that can efficiently and safely remove stains that have adhered to and deteriorated in the kitchen and its surroundings, such as ventilation fans, vertical surfaces such as walls, and ceilings. The present invention relates to a liquid cleaning composition having appropriate viscosity. Oil and fat stains derived from food are often altered by the effects of heat, sunlight, oxygen in the air, etc., and become resinous or semi-dry and hard stains. It is mainly seen attached to ventilation fans, range hoods, water heaters, vertical parts such as walls, and ceilings. Alkaline detergents are effective for removing stubborn oil stains that adhere to vertical surfaces and ceilings, but conventional detergents have a low viscosity and can be sprayed onto the stains or sprayed in a spray container. The liquid may run down or sag quickly, so its effectiveness is not fully demonstrated, and the liquid may scatter or get onto clean areas, making it inconvenient to use. In the case of neutral to weakly alkaline compositions, it is relatively easy to prepare compositions that have good retention properties for highly viscous stains, but these do not have sufficient cleaning power. Therefore, as a result of intensive research to overcome these drawbacks, the inventors of the present invention used a specific partially crosslinked polyacrylic acid as a thickener and combined it with an inorganic or organic alkaline agent and a surfactant to achieve a pH of 11. The present invention was completed based on the discovery that when adjusted to 14, it is possible to obtain a liquid detergent composition that has good retention on vertical surfaces, has little scattering, and can easily remove dirt such as oil and fat. Therefore, the present invention provides (a) a partially crosslinked polyacrylic acid having a viscosity of 2.5% by weight, 0.2N NaOH aqueous solution (20°C) of 1000 to 16000 cp and a Bruckfield yield value of 100 to 1600 g/sec cm; 0.5 to 5% by weight; (b) one or more inorganic or organic alkaline agents;
(c) 0.1 to 20% by weight of a surfactant as essential components, and has a pH of 11 to 14. The partially crosslinked polyacrylic acid used as a thickener in the present invention has a viscosity of 1000 to 16000 cp as a 2.5% by weight, 0.2N-NaOH aqueous solution (20°C), and a Bruckfield yield value of 100 to 1600 g/sec. cm. Here, the Bruckfield yield value is a value obtained by measuring the apparent viscosity of the above aqueous solution at 20°C and using the following formula, and when the molecular weight is the same, the larger this value is, the higher the degree of crosslinking is. do. Burtskfield yield value = B8H type viscometer rotor No.3
, apparent viscosity at 0.5 rpm/100 -B8H type viscometer rotor No. 3, apparent viscosity at 1 rpm In addition, as a crosslinking agent for the partially crosslinked polyacrylic acid of the present invention, for example, a polyvalent metal salt of acrylic acid or methacrylic acid, glyoxal Examples include one or more selected from alkenyl compounds, allylated glycerin, allylated pentaerythritol, allyl (meth)acrylate oligomer, triallyl isocyanurate, triallyl phosphate, tetraallylsilane, polyalkenyl sulfone, and butadiene oligomer. . These crosslinkers are preferably 0.3 to 15% by weight of the acrylic acid;
If the amount of the crosslinking agent is too small, sufficient viscosity cannot be obtained, and if it is too large, the solubility deteriorates, which is not preferable. The partially crosslinked polyacrylic acid of the present invention exhibits a sufficient thickening effect both in alkaline conditions and in aqueous solutions with high ionic strength, and is stable with almost no change in viscosity over time. On the other hand, ordinary polyacrylic acid, polyvinyl alcohol, locust bean gum, etc. do not have sufficient viscosity in an alkaline aqueous solution. Furthermore, even if xanthan gum, carboxymethylcellulose, or crosslinked polyacrylic acid is used, those whose crosslinking agent is allylated sucrose, diethylene glycol bisallyl ether, or diethylene glycol bismethallyl ether have sufficient viscosity when preparing a solution, but in an alkaline solution, The viscosity decreases significantly over time, especially during the summer when the temperature is high, the dirt retention is poor, and a sufficient cleaning effect is not achieved. In the present invention, the partially crosslinked polyacrylic acid is blended in the composition in an amount of 0.5 to 5% by weight, preferably 0.5 to 3.5% by weight. If the amount of partially crosslinked polyacrylic acid is less than this, the viscosity will be less than 100 cp, and if it is used on a vertical surface, it will quickly run off, and if it is more than this, the composition will become gel-like, causing problems in use. Inorganic or organic alkaline agents include, for example, alkali metal hydroxides, silicates, carbonates, phosphates, borates, hydroxycarboxylate salts or the following general formula () or (), (C _o H _2o OH) _n NH _3-n () (C _o ′H _2o ′ ₊₁ ) _n NH _3-n () (in the formula, n is 2 or 3, n′ and m are integers from 1 to 3) Mention may be made of the amines shown below. in particular,
Preferred are sodium hydroxide, potassium mercury, sodium silicate, sodium carbonate, sodium citrate, monoethanolamine, diethanolamine, and the like. When the cation of the alkali agent is a polyvalent metal such as Ca, Mg, Al, etc., the solubility of the partially crosslinked polyacrylic acid deteriorates, which is not preferable. These alkaline agents are present in the composition in an amount of 0.1 to 30% by weight, preferably
Add 0.5 to 10% by weight and adjust the pH to 11 to 14. The surfactant is not particularly limited, and cleaning active ingredients used in general household detergents can be used, but nonionic surfactants or anionic surfactants are particularly preferred. These include, for example, straight or branched long chain alkyl benzene sulfonates, long chain monoalkyl sulfate salts, long chain alkyl sulfonates, long chain olefin sulfonates and long chain alkyl or Anionic surfactants such as alkyl phenyl polyoxyethylene (1-6) ether sulfates having 8 to 18 carbon atoms: long chain alkyl of polyoxyethylene (3 to 12) or alkyl having 8 to 18 carbon atoms Examples include nonionic surfactants such as phenyl ether long chain fatty acid monoethanolamide and long chain fatty acid diethanolamide. These surfactants are present in the composition at 0.1
~20% by weight, preferably 0.5~10% by weight. The liquid cleaning composition of the present invention has the above-mentioned essential component (a).
-(c) may be contained, but a water-insoluble abrasive may be further blended therein. This abrasive not only increases the cleaning effect through its abrasive effect, but also has the effect of thickening the viscosity and making it opaque, thereby making it possible to confirm the location and degree of adhesion of the cleaning composition. Examples of water-insoluble abrasives include silicon dioxide, aluminum oxide, magnesium oxide, titanium oxide, aluminosilicate, silicon carbide, calcium carbonate, calcium phosphate, chromium oxide or corundum, emery, silica, quartz sand, dolomite, sand, and shells. Examples include natural pulverized products. Of these, crushed silica or quartz sand is most commonly used. Although the particle size of the abrasive may be coarse, it is preferably 2 to 150 microns in size so as not to damage the surface to be polished. These abrasives are present in the composition in an amount of 5 to 70% by weight, especially 10 to 60% by weight.
It is preferable to mix it by weight%. In addition to the above-mentioned components, the liquid detergent composition of the present invention may contain optional components that are generally incorporated in such cases,
For example, small amounts of fragrances, pigments, dyes, bactericides, solubilizers, etc. may be added. Next, an example will be given and explained. In addition, % in examples
is expressed as a weight ratio. Example 1 A cleaning agent having the composition shown in Table 1 was prepared, and its viscosity and storage stability were examined. (1) Viscosity The detergent was placed in a viscosity beaker, heated to 20°C, and measured using a B-type viscometer (rotation speed: 30 rpm). (2) Retention property on vertical surfaces A cleaning agent stored at 35°C for 40 days was attached to a vertically erected polypropylene plate, and its retention property was investigated. ○ does not flow down. △ slowly flows down. × flows down quickly. (3) Results

[Table] Example 2 A cleaning agent having the composition shown in Table 2 was prepared and used in Example 1.
The viscosity and storage stability were examined in the same manner as above. The results are shown in Table-2.

[Table] Example 3 The cleaning power of the cleaning agents shown in Table 3 was investigated.
The results are shown in Table-3.

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【table】

Claims (1)

[Claims] 1 (a) 2.5% by weight, 0.2N NaOH aqueous solution (20°C)
0.5 to 5% by weight of partially crosslinked polyacrylic acid having a viscosity of 1000 to 16000 cp and a Burckfield yield value of 100 to 1600 g/sec cm; (b) one or more inorganic or organic alkali agents;
(c) 0.1 to 20% by weight of a surfactant as essential components, and has a pH of 11 to 14. 2. The crosslinking agent for the partially crosslinked polyacrylic acid is a polyvalent metal salt of acrylic acid or methacrylic acid, a glyoxal alkenyl compound, allylated glycerin, allylated pentaerythritol, allyl (meth)acrylate oligomer, triallyl isocyanurate, triallyl phosphate, The liquid detergent composition according to claim 1, which is one or more selected from tetraallylsilane, polyalkenyl sulfone, and butadiene oligomer, and contains 0.3 to 15% by weight of acrylic acid. 3 The alkali agent is an alkali metal hydroxide, silicate, carbonic acid, phosphate, borate, hydroxycarboxylate, or the following general formula () or (), (C _o H _2o OH) _n NH _3-n () (C _o ′H _2o ′ ₊₁ ) _n NH _3-n () (wherein, n is 2 or 3, n′ and m are integers of 1 to 3); A liquid cleaning composition according to claim 1. 4. The liquid cleaning composition according to claim 1, wherein the surfactant is a nonionic surfactant or/and an anionic surfactant. 5. The liquid cleaning composition according to claim 1, containing 5 to 70% by weight of a water-insoluble abrasive. 6 The water-insoluble abrasive is silicon dioxide, aluminum oxide, magnesium oxide, titanium oxide, aluminosilicate, silicon carbide, calcium carbonate,
calcium phosphate, chromium oxide or corundum,
6. The liquid cleaning composition according to claim 5, which is a natural crushed product of emery, silica, quartz sand, dolomite, sand, shell, etc.